This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Images that can't be captured on a screen are called A) Real image. B) Virtual image. C) Proper image. D) Imaginary image. Show Answer Correct Answer: B) Virtual image. 2. You are given water, mustard oil, glycerin and kerosene. In which of these media, a rayoflightincidentfrom air obliquelyat the sameangle would bend the most? (Refractive index of water = 1.33, mustard oil =1.46, Glycerin = 1.473, kerosene = 1.44) A) Water. B) Mustard oil. C) Kerosene. D) Glycerin. Show Answer Correct Answer: D) Glycerin. 3. A prism can be used to ..... A) Separate visible light into colors. B) Make a beam of light brighter. C) Measure the speed of light. D) Make UV light visible. Show Answer Correct Answer: A) Separate visible light into colors. 4. Ateachersetsupthestandcarryingaconvex lensoffocallength15cmat42.7cmmarkon theopticalbench.HeasksfourstudentsA, B, CandDtosuggestthepositionofscreenon theopticalbenchsothatadistinctimageof adistanttreeisobtainedalmostimmediately onit.Which student is correct if the positionssuggestedbythestudents wereas: A) 12.7 cm. B) 29.7 cm. C) 57.7 cm. D) 72.7 cm. Show Answer Correct Answer: C) 57.7 cm. 5. Sunlight is A) Not light at all. B) Red light. C) Yellow light. D) White light. Show Answer Correct Answer: D) White light. 6. Shining a light on a prism will ..... A) Magnify the light. B) Move the light in a line. C) Make heat. D) Compose many different colors. Show Answer Correct Answer: D) Compose many different colors. 7. Which of the following can't reflect sunlight? A) Polished screen. B) Still water. C) Aluminium foil. D) Bedsheet. Show Answer Correct Answer: D) Bedsheet. 8. I can provide an essential vitamin to your body. I can also cause skin cancer. Who am I? A) Ultraviolet rays. B) Infrared rays. C) Gamma rays. D) Radio waves. Show Answer Correct Answer: A) Ultraviolet rays. 9. Example of a opaque object is A) Black box. B) Butter paper. C) All the above. D) None of the above. Show Answer Correct Answer: A) Black box. 10. The image formed by a plane mirror is real. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. If the focal length of concave lens is 40 cm, then the power of lens is A) -0.025 D. B) + 0.025 D. C) -2.5 D. D) + 2.5 D. Show Answer Correct Answer: C) -2.5 D. 12. The ability of a lens is +2.0 d but it is A) Convex lens. B) Lens. C) Pipeline. D) Shouting. Show Answer Correct Answer: A) Convex lens. 13. A ray of light travelling obliquely from a rarer medium to a denser medium bends ..... the normal at the surface of separation of the two media A) Towards. B) Away. C) All the above. D) None of the above. Show Answer Correct Answer: A) Towards. 14. Concave mirror is used as reflector in search light, head light of motor vehicles to get powerful parallel beam of light A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 15. Which equation related to ohm's law? A) V = go. B) R=V/I. C) I=V/R. D) All of the above. Show Answer Correct Answer: D) All of the above. 16. Every star produces it own light A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. Which of the following allow light to pass through it easily A) A metal plate. B) Glass tumbler. C) Book. D) A wooden block. Show Answer Correct Answer: B) Glass tumbler. 18. Visible Light is Made of seven Colours A) Fiber. B) Vibgoyr. C) VIBGYRO. D) None of the above. Show Answer Correct Answer: A) Fiber. 19. Which of the following are used as reflectors in street lights to spread the light over a wide area? A) Concave mirrors. B) Plane mirrors. C) Convex mirrors. D) Convex lens. Show Answer Correct Answer: C) Convex mirrors. 20. Which of the materials are translucent? A) A desk. B) A baseball. C) A doll. D) A piece of tissue paper. Show Answer Correct Answer: D) A piece of tissue paper. 21. Ram's shadow is longer at 5:15 in the evening than 2 pm. Why? A) Sun is brighter in evening. B) Sun is at higher angle in evening. C) Sun is at lower angle in the evening. D) Sun is exactly at top in the evening. Show Answer Correct Answer: C) Sun is at lower angle in the evening. 22. MATERIALS WHICH ALLOW LIGHT TO PASS PARTIALLY ARE CALLED AS A) OPAQUE OBJECTS. B) TRANSLUCENT OBJECTS. C) TRANSPARENT OBJECTS. D) None of the above. Show Answer Correct Answer: B) TRANSLUCENT OBJECTS. 23. Sunlight is composed of 7 colours. This cannot be demonstrated using- A) Newton's disc. B) Rainbow formation. C) Passing a white light through a glass slab. D) Passing a white light through prism. Show Answer Correct Answer: C) Passing a white light through a glass slab. 24. Why does white clothing keep you cooler in the summer compared to black or dark clothing? A) Because the white wavelengths of light to not carry heat. B) Because dark material reflects the hot waves away. C) Light waves carry energy. A white surface reflects almost all the light and its energy. D) Black material does not absorb light waves. Show Answer Correct Answer: C) Light waves carry energy. A white surface reflects almost all the light and its energy. 25. Definition of light A) Light produces sensation of sight in our eyes. B) Which makes us see things. C) All the above. D) None of the above. Show Answer Correct Answer: A) Light produces sensation of sight in our eyes. ← PreviousNext →Related QuizzesClass 7 Science Chapter 11 Light Quiz 1Class 7 Science Chapter 11 Light Quiz 2Class 7 Science Chapter 11 Light Quiz 3Class 7 Science Chapter 11 Light Quiz 4Class 7 Science Chapter 11 Light Quiz 6Class 7 Science Chapter 11 Light Quiz 7Class 7 Science Chapter 11 Light Quiz 8Class 7 Science Chapter 11 Light Quiz 9Class 7 Science Chapter 11 Light Quiz 10Class 7 Science Chapter 11 Light Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books